JPH09167041A - Keyboard lock system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the complexity of operation and improve the safety by performing control so that subsequent input is made effective after a previously set password is inputted in an ineffective period of input. SOLUTION: A CPU 105 inputs a signal (data inputted from a keyboard 101) outputted from a controller 102 and outputs a signal corresponding to the data to a display device, which displays the data. When the specific correct password is inputted or when key input is done before time is up, a timer 103 is reset and made to start counting. When a specific timeout is elapsed and the flag of the timer 103 is set ON, the controller 102 inhibits the data inputted from the keyboard 101 from being transferred to the CPU 105, but when the flag is OFF, the data transfer to the CPU 105 is allowed. Consequently, the operator need not do operation for locking the input means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard lock system, and more particularly to a keyboard lock system having a function of locking a key input by another person or a key input by carelessness.

[0002]

As a conventional technique related to a keyboard lock system, for example, Japanese Patent Laid-Open No. 62-293414 discloses
The purpose of the invention is to provide an information processing device that prevents an accident such as processing or information loss by a third party other than the user from being inexpensive and simple, and that can unlock even when the keyboard is locked. , While the time counting means for counting time and the time counting means for counting the time length set from the outside,
An information processing apparatus including an input stopping unit that does not accept an input, and an input that cancels the input stopping by the input stopping unit and accepts the input even while the information processing apparatus does not accept the input An information processing apparatus including a stop canceling unit has been proposed. Further, according to the information processing device proposed in the above-mentioned Japanese Patent Laid-Open No. 62-293414, in order to prevent the information processing device from accepting an input, a predetermined operation by the operator is required as follows. And

FIG. 5 is a flow chart for explaining the key lock operation in the word processor proposed in the above-mentioned Japanese Patent Laid-Open No. 62-293414. Referring to FIG. 5, in the operation of the word processor, the control unit of the word processor makes a key input determination in step S21. If there is a key input, the process branches to step S27, and if there is no key input, the process branches to step S22. First, the flowcharts after step S27 will be described. Step S2
In 7 the key lock is judged and if it is in the key lock state,
finish. If the key is not locked, step S28
It branches to and fetches the input key and converts it to the internal code. Then, it is determined whether or not the input is a function key or another character key (step S2).
9) If it is another character key or the like, the process branches to step S34 to perform a normal key input process. If the input is a function key, the process branches to step S31 to determine whether the input is a timer designation key. If it is another function key input, the process branches to step S35 to perform the processing. If it is the input of the timer designation key, the process branches to step S31 to display a key lock time designation request by timer setting, and subsequently, a process according to the input timer setting value is performed. Next, the key lock is turned on (step S3
2), interrupt processing by counting up the timer is enabled (interrupt enable) (step S3)
3).

If there is no key input in step S21, the process branches to step 22 and ends if there is no timer interrupt (interrupt), and if there is a timer interrupt to step S23. Then, if the timer count (value) is not 0, the process is terminated. If it is 0, the process branches to step S25 to perform a timer interrupt (interrupt).
Is not allowed (OFF) and the key lock is released (OFF)
Then (step S26), the process ends.

Further, for example, in Japanese Unexamined Patent Publication No. 5-12960, for the purpose of providing a key lock switch in which the keyboard lock state is not easily released even if the keyboard lock switch is pressed by mistake in the keyboard lock state, A keyboard lock switch operated by and a timer for measuring the time for which the keyboard lock is held down is provided, and a key lock switch that releases the keyboard lock state when the keyboard lock switch is pressed for a predetermined time is proposed. ing.

FIG. 6 is a diagram for explaining the circuit configuration of the key lock switch proposed in the above-mentioned Japanese Patent Laid-Open No. 62-293414. Referring to FIG. 6, the circuit of the key lock system includes a lock switch 1, a flip-flop 2,
Key switch 3, 3 state buffer 4, timer 5, N
It is composed of an OR circuit 6. Then, the flip-flop 2 inverts the control signal to the 3-state buffer 4 when the timer 5 counts a predetermined time, and also turns off the power.
Reset by The NOR circuit 6 stops the counting operation of the timer 5 when the timer 5 counts a predetermined time.

Next, the operation of the key lock switch will be described. First, the ON / OFF state of the key switch 3 is 3
It is input to the state buffer 4. If the 3-state buffer 4 is enabled, the ON / OFF state of the key switch 3 is sent out in the arrow direction (on the right side in FIG. 6) via the 3-state buffer 4. Next, when the lock switch 1 is pushed down, the timer 5 starts counting. When the timer 5 counts a predetermined time, the level of the signal output from the flip-flop 2 and input to the 3-state buffer 4 according to the output of the timer 5 is “L (low)”.
To "H". As a result, the signal output from the flip-flop 2 and input to the 3-state buffer 4 is inverted, the NOR circuit 6 stops the counting operation of the timer 5 and the 3-state buffer 4 is disabled. Therefore, even if the key switch 3 is pressed down thereafter, the ON / OFF information of the key switch 3 is not transmitted from the 3-state buffer 4, and the setting information before being disabled is in a locked state. Here, when the lock switch 1 is turned off, the timer 5 is reset. When the lock switch is kept pressed down, the signal output from the flip-flop 2 and input to the 3-state buffer 4 is inverted again, the 3-state buffer 4 is enabled, and the key lock is released.

As still another conventional technique for a keyboard lock, for example, Japanese Patent Laid-Open No. 2-91754 discloses a key device for the purpose of providing a terminal device for covering a key switch operation error and ensuring a protective function. A key sensor for detecting the insertion / removal state, an operator sensor for detecting the leaving of the operator at a predetermined operation position, and a timer for measuring the leaving time of the operator in the key-inserted state and notifying after the predetermined time is continued, There has been proposed a terminal device in which a timer starts counting time when an operator's leaving the seat is detected by an operator sensor and prohibits a terminal processing operation when the leaving of the operator continues for a predetermined time or longer.

[0009]

However, the conventional systems proposed in, for example, Japanese Patent Laid-Open No. 62-293414 and Japanese Patent Laid-Open No. 62-293414 are designed to lock input means such as a keyboard. Requires the operator to perform a predetermined operation. Therefore, for example, when a call is made and the user suddenly stands up and does not perform the keyboard lock operation, there is a possibility that valuable information and the like may be lost due to an incorrect keyboard operation by a third party other than the user. Have a point.

Further, the conventional systems proposed in Japanese Patent Laid-Open No. 62-293414 and Japanese Patent Laid-Open No. 62-293414 have only to hold the input stop releasing means or the key lock switch for a predetermined time. However, since a third party can easily unlock the keyboard, there is a problem that a malicious third party may tamper with the information.

Further, in the conventional system proposed in the above-mentioned Japanese Patent Laid-Open No. 2-91754, a sensor for detecting the leaving of the operator is indispensable, and the detection output of this sensor including this sensor is transmitted. It is necessary to provide a signal line and a board for inputting the signal line, which causes an increase in cost and requires a space for arranging these members,
There is a problem that.

Therefore, the present invention has been made in view of the above problems and does not require a special operation for locking the keyboard and can be easily released by a third party other than the operator. It is intended to provide a keyboard lock system with improved safety without a key.

[0013]

In order to achieve the above object, the present invention invalidates subsequent input to the input means when the input means does not input for a predetermined period of time, and at the same time, the input means When a preset password is input to the input means during the invalid period of input to the input means, the keyboard lock system is controlled so as to enable subsequent input to the input means. provide.

According to the present invention having the above-mentioned structure, the input to the input means such as the keyboard is enabled or disabled, that is, the unlock or the lock mode is selected during the period when there is no input to the input means. Since the operation is automatically performed depending on whether or not the predetermined period has been exceeded, the operator does not need an operation for locking the input means.

As an example, when a timer is used as a means for timing the above-mentioned predetermined period, whether or not to process (validate) the input to the input means is first checked by checking whether the timer has timed out, and ) When the time is out, the input to the input means is invalidated (locked).
(B) When the timeout has not occurred, the input to the input means is validated and a predetermined process is performed. Following (a) above, the input data to the input means and the password registered in advance are collated, and (a) if the input data and the password do not match, the locked state is held. (B) If they match, the timer is reset and the input to the input means is validated (unlocked) again.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

[0017]

[Embodiment 1] FIG. 1 is a block diagram illustrating a schematic configuration of a keyboard lock system according to an embodiment of the present invention.

Referring to FIG. 1, the keyboard lock system of the present embodiment comprises a keyboard 101, a controller (control device) 102, a timer 103, a memory 104, and a central processing control device (hereinafter referred to as "CPU") 105,
Consists of A display device (not shown) is connected to the CPU 105.

The keyboard 101 is an input means and outputs a signal corresponding to a key input to the controller 102.
Other input devices may be used instead of the keyboard.

The timer 103 is a time measuring means, a time-out time is set, a flag (not shown) is turned off during time counting (time counting), and this flag is turned on during time-out. This flag is accessed by the controller 102 and restarts timing if reset. The time-out time can be arbitrarily set via a command from the controller 102 or the like. The memory 104 temporarily stores the data input by the key when registering the password, and also stores the data of the registered password in a non-volatile memory (for example, a read-only memory that can electrically erase and write data). Store in.

The CPU 105 inputs a signal output from the controller 102 (data input from the keyboard 101), outputs a signal corresponding to this data to a display device (not shown), and the display device displays this data. To do. The controller 102 controls locking and unlocking of the keyboard 101, and also controls the keyboard 101, the timer 103, and the memory 104, and manages transmission and reception of data signals between them.

Specifically, the key input discrimination on the keyboard 101, the collation between the password input from the keyboard 101 and the password stored in the memory 104 with respect to the password arbitrarily set by the user, the data transfer, the data transfer to the memory 104. Password registration and timer 10
Registration setting of the timeout time (length of timeout time) of 3 is performed.

More specifically, when a predetermined correct password is input or a key is input before the time-out, the timer 103 is reset to start counting. When a predetermined time-out period has elapsed and a flag (not shown) of the timer 103 is turned on, the controller 102 does not allow transfer of data input from the keyboard 101 to the CPU 105. On the other hand, if this flag is off, CP
Allow U105 data transfer. The permission / non-permission of the transfer is realized by a method such that the controller 102 does not transfer the data input from the keyboard 101 to the bus, or does not raise an interrupt to the CPU 105 when input from the keyboard 101. The controller 102
Is preferably a predetermined processor, and has a controller 102 and a CPU according to the design method of the information processing apparatus.
105 and 105 may be configured as one CPU.

FIG. 2 is a flow chart for explaining the operation of the keyboard lock system of the embodiment of the present invention shown in FIG.

Referring to FIGS. 1 and 2, in the keyboard lock system according to the present embodiment, when there is a key input (step 201), the controller 102 causes the timer 1 to operate.
Whether or not 03 has timed out is determined by turning on / off the flag of the timer 103 (step 202).
If the flag is a logical value "0" (off state), that is, before timeout (time counting), the controller 102 always transfers keyboard input data to the CPU 105, and this keyboard input data is output to a display device (not shown). (Step 203).

The flag has a logical value "1" (ON state),
That is, if the time is out, the flow branches to step 204 to determine whether the key input is a return key input (line feed mode input code). If the key input is not the return key input, the process branches to step 205 to store the input data, and the process proceeds to step 204 again.

On the other hand, in the case of the return key input, the process branches to step 206, and the key input data stored (accumulated) before the return key is input and the registered password are the same. Is checked.

If the stored character string and the password do not match, the process branches to step 207 to erase the stored data (character string), and the process ends with the locked state of the keyboard 101 maintained.

On the other hand, if the stored data (character string) and the password match, the process branches to step 208, the timer 103 is reset to restart the counting, and the locked state of the keyboard 101 is released.

Next, the operation of the password registration process in the keyboard lock system of this embodiment will be described.

FIG. 3 is a flow chart for explaining the operation of the password registration process in the embodiment of the present invention shown in FIG.

Referring to FIGS. 1 and 3, the password registration process in the keyboard lock system according to the present embodiment is started by inputting a password registration command (step 301). Then, the operator inputs a key (step 302) and determines whether the key input is a return key or another general key (step 303). If the key input is a general key, the process branches to step 304 to store the key input data.

On the other hand, if the key input is the return key, the process branches to step 305 to ask the user whether or not the data stored until the return key is pressed is registered as a password. If the operator does not wish to register the password, the process branches to step 306 and the data is erased. On the other hand, if the operator wants to register the password, the process branches to step 307.
Prompts you to enter the same password again for confirmation. Then, it is determined whether the first and second passwords are the same (step 308).

When the first and second passwords are different, a message for re-registering is displayed (step 309), and the process proceeds to the password input request process (step 302) again. On the other hand, if the first and second passwords are the same, the input data is registered as a password in the non-volatile memory of the memory 104 (step 310).

[0035]

[Embodiment 2] A keyboard lock system according to a second embodiment of the present invention is similar to the operation of the first embodiment of the present invention described with reference to FIGS. In addition to not accepting input, it is further characterized by warning that there is an illegal key input. The configuration of the keyboard lock system according to the second embodiment of the present invention is basically the same as the configuration of the first embodiment shown in FIG.

FIG. 4 is a flow chart for explaining the operation of the keyboard lock system according to the second embodiment of the present invention.

Referring to FIGS. 1 and 4, the keyboard lock system according to the second embodiment of the present invention, when there is a key input (step 401), the controller 102 is operated.
Determines whether the timer 103 has timed out by turning on / off a flag of the timer 103 (step 402). If the flag is a logical value "0" (off state), that is, before timeout (time counting), the controller 102 always transfers keyboard input data to the CPU 105, and this keyboard input data is output to a display device (not shown). (Step 403).

The flag has a logical value "1" (ON state),
That is, if it has timed out, the process branches to step 404 and the key input is the return key input (line feed mode input,
Input delimiter symbol). If the key input is not the return key input, step 405
And the input data is stored, and step 40 is repeated.
Move to 4.

On the other hand, in the case of the return key input, the flow branches to step 406, and the key input data stored (stored) before the return key is input and the registered password are the same. Check whether or not. If the stored character string does not match the password, the process branches to step 407, the stored data (character string) is erased, and an alarm is output (step 40).
9), the process is ended with the keyboard 101 kept in the locked state. As a form of this alarm, for example, the controller 102 sends the keyboard input data from the controller 102 to the CPU 105 by a timeout.
A signal indicating that the data cannot be transferred to the PU 105 and that an unlock command (password) is required to unlock the lock is transmitted, and the CPU 105 receiving this signal sends a predetermined signal to a display device (not shown). Display a message. Alternatively, a warning sound or the like is issued to call attention to the operator or a third party other than the operator.

On the other hand, if the stored data (character string) and the password match, the process branches to step 408 and the timer 1
Reset 03 to restart counting, keyboard 1
The lock state of 01 is released and the process ends.

[0041]

As described above, according to the keyboard lock system of the present invention, the complexity of the operation of locking and unlocking the keyboard is eliminated, and the safety is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a keyboard lock system according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining an operation of the keyboard lock system according to the exemplary embodiment of the present invention shown in FIG.

FIG. 3 is a flowchart for explaining an operation of password registration processing in the embodiment of the present invention shown in FIG.

FIG. 4 is a flowchart for explaining the operation of the keyboard lock system according to the second embodiment of the present invention.

FIG. 5 is a flowchart for explaining a key lock operation in a conventional word processor.

FIG. 6 is a diagram for explaining a circuit configuration of a conventional key lock switch.

[Explanation of symbols]

 1 Lock Switch 2 Flip Flop 3 Key Switch 4 3 State Buffer 5 Timer 6 NOR Circuit 101 Keyboard 102 Controller 103 Timer 104 Memory 105 CPU

Claims (2)

[Claims] 1. When the input unit has not been input for a predetermined period of time, the subsequent input to the input unit is invalidated, and a preset password is set in the invalid period of the input to the input unit. A keyboard lock system characterized in that, when an input is made to the input means, the subsequent input to the input means is controlled to be effective. 2. An input means, a means for registering a password, a clocking means, a locking means, and an unlocking means, the clocking means before the predetermined period has elapsed and during clocking. The flag is turned off, the flag is turned on when the predetermined period has elapsed, and the locking means enables the input to the input means when the flag is in the off state, and the input means when the flag is in the on state. However, the unlocking means resets the clocking means when the password registered in the means for registering the password and the input information from the input means match. The keyboard lock system is characterized in that the flag is controlled so as to be turned off so as to restart timing.